This is not as perfect as it is elsewhere in the system, as we cannot
really change how terminal "thinks about" characters and bytes. What
we can do though, and what this commit does, is to *render* emojis, but
make it seem as if they take up all the space, and all the columns their
bytes would take if they were all regular characters.
From here on, all strings displayed to the user are expected to
be encoded as UTF-8. The next few commits will deal with a few
existing places where this requirement is currently violated.
https://github.com/SerenityOS/serenity/issues/490
This class can locate and load emojis, which are expected to be stored
as regular PNG images at /res/emoji/U+XXXX.png, where XXXX is the
character codepoint.
https://github.com/SerenityOS/serenity/issues/490
This commit drastically changes how signals are handled.
In the case that an unblocked thread is signaled it works much
in the same way as previously. However, when a blocking syscall
is interrupted, we set up the signal trampoline on the user
stack, complete the blocking syscall, return down the kernel
stack and then jump to the handler. This means that from the
kernel stack's perspective, we only ever get one system call deep.
The signal trampoline has also been changed in order to properly
store the return value from system calls. This is necessary due
to the new way we exit from signaled system calls.
This can play anything that AWavLoader can load (so obviously only WAV
files at the moment.)
It works by having a timer that wakes up every 100ms and tries to send
a sample buffer to the AudioServer. If our server-side queue is full
then we wait until the next timer iteration and try again.
We display the most recently enqueued sample buffer in a nice little
widget that just plots the samples in green-on-black. :^)
This is a variant of the enqueue() API that returns immediately and
may fail. It's useful when you don't want to block until the audio
server can receive your sample buffer.
Passing these through the generic JsonValue path was causing us to
instantiate temporary JsonValues that incurred a heap allocation.
This avoids that by adding specialized overloads for string types.
The alternate status register is not part of the same set of registers
as all the other stuff.
Also rename wait_400ns() to io_delay() since we had no guarantee that
it was waiting for 400ns..
CTCP requests are client-to-client messages that are sent as either
PRIVMSG (for requests) or NOTICE (for responses) and wrapped in ASCII
character 0x01 on both sides.
This patch implements responding to the very common VERSION and PING
requests. We always get a VERSION request from freenode when connecting
there, for instance. :^)
